Control drive circuit and electric nail gun

Abstract

The utility model discloses a control drive circuit and an electric nail gun. The control drive circuit comprises an MCU circuit. The step-down circuit, the coil control circuit, the fan control circuit, the key circuit and the temperature protection circuit are respectively and electrically connected with the MCU circuit; the step-down circuit is electrically connected with the battery pack and is used for performing stable step-down operation on the output voltage of the battery pack; the coil control circuit is electrically connected with the coil assembly and stably controls the input current of the coil assembly; the fan control circuit is electrically connected with the fan and drives the fan to rotate; the key circuit is electrically connected with the keys; and the temperature protection circuit monitors the temperature of the MCU circuit in real time. According to the utility model, the input current of the coil assembly is stably controlled by controlling the driving circuit, so that the coil assembly cannot be excessively heated, and the problem that the impact force of the electrified coil of the existing electric nail gun is reduced due to heating is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric nail guns, and in particular to a control drive circuit and an electric nail gun. Background Art

[0002] In many occasions of industrial production, electric nail guns are needed to fasten products. They are essential tools for woodworking, construction and other industries. In the prior art, nail guns generally use cylinders or energized coils to drive the firing pin to perform the striking operation; nail guns driven by cylinders are generally composed of a gun body and a magazine; the gun body consists of a gun shell, a cylinder, a balance valve, a trigger assembly, a firing pin assembly, a buffer pad, a gun mouth, a gun cover and a bumper assembly, etc., and the pressure difference between compressed air and the atmosphere is used to make the firing pin piston reciprocate in the cylinder through the trigger switch; the magazine uses a compression spring, a tension spring or a coil spring to send the gun nail into the gun cover slot, and when the firing pin is pushed out of the gun mouth at high speed, the nail is driven out. A nail gun driven by an energized coil is generally composed of a gun body and a magazine, wherein the energized coil in the gun body is directly energized to generate an electromagnetic field, which drives the firing pin assembly to move and strike the U-shaped staple through magnetic attraction. The above two methods of driving the firing pin have the following disadvantages: the nail gun driven by the cylinder method has a relatively complex structure and a high cost; the nail gun driven by directly energizing the energized coil has a relatively simple structure, but the continuous heating of the coil and the change in resistance cause the impact force of the electric nail gun to decrease, thereby making the U-shaped staple shot out of it unstable. Therefore, a control drive circuit and an electric nail gun are provided to solve the problem that the existing electric nail gun has a reduced impact force due to the heating of the energized coil. Utility Model Content

[0003] One of the purposes of the utility model is to provide a control drive circuit and an electric nail gun, so as to solve the problem that the impact force of the existing electric nail gun is reduced due to heating of the energized coil.

[0004] The utility model provides a control drive circuit and an electric nail gun which can be realized by the following technical solutions:

[0005] The utility model discloses a control drive circuit applied to an electric nail gun, comprising an MCU circuit; a step-down circuit, a coil control circuit, a fan control circuit, a key circuit and a temperature protection circuit which are electrically connected to the MCU circuit respectively; the step-down circuit is electrically connected to a battery pack, and performs a stable step-down operation on the output voltage of the battery pack; the coil control circuit is electrically connected to a coil component, and stably controls the input current of the coil component; the fan control circuit is electrically connected to a fan, and drives the fan to rotate; the key circuit is electrically connected to a key; and the temperature protection circuit monitors the temperature of the MCU circuit in real time.

[0006] In one embodiment, the step-down circuit includes a 12V step-down circuit and a 5V step-down circuit; the 12V step-down circuit is electrically connected to the battery pack and the fan control circuit respectively; the 5V step-down circuit is electrically connected to the MCU circuit, the 12V step-down circuit, and the temperature protection circuit respectively.

[0007] In one implementation manner, the MCU circuit adopts a single chip microcomputer.

[0008] In one embodiment, the MCU circuit includes 8 pins, pin 1 is electrically connected to the 5V step-down circuit; pin 2 is unconnected; pin 3 is electrically connected to the key circuit; pin 4 is electrically connected to the fan control circuit; pins 5 and 7 are electrically connected to the coil control circuit respectively; pin 6 is electrically connected to the temperature protection circuit; and pin 8 is grounded.

[0009] An electric nail gun includes a shell assembly, which is a hollow cavity; a circuit board assembly, a coil assembly and a fan respectively fixedly arranged in the shell assembly, and the circuit board assembly is provided with any of the control drive circuits described above; a nail pusher assembly movably penetrating the coil assembly; a nail gate assembly arranged on the side of the shell assembly and on one side of the nail pusher assembly, and a plurality of U-shaped nails are arranged in sequence in the nail gate assembly.

[0010] In one embodiment, the nail gate assembly is detachably connected to the side of the shell assembly.

[0011] Compared with the prior art, the control drive circuit and the electric nail gun of the utility model have the following beneficial effects:

[0012] The utility model provides a control drive circuit and an electric nail gun, through the cooperation of an MCU circuit and a coil control circuit, so that the input current of a coil component is relatively stable, so that the coil component will not be overheated, and the impact force of a nail gate component will not be reduced, which effectively solves the problem that the impact force of an existing electric nail gun is reduced due to the heating of the coil when it is powered on; the coil component is energized to generate an electromagnetic field, and the magnetic attraction generated by the electromagnetic field drives the nail pusher component to move, so that the U-shaped nails in the nail gate component are shot in sequence. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1This is an electrical connection diagram of a control drive circuit of the utility model, including an MCU circuit, a 12V step-down circuit, a 5V step-down circuit, a coil control circuit, a fan control circuit, a key circuit and a temperature protection circuit;

[0015] Figure 2 yes Figure 1 The specific circuit diagram of the MCU circuit shown;

[0016] Figure 3 yes Figure 1 The specific circuit diagram of the 12V step-down circuit shown;

[0017] Figure 4 yes Figure 1 The specific circuit diagram of the 5V step-down circuit shown;

[0018] Figure 5 yes Figure 1 The specific circuit diagram of the coil control circuit shown;

[0019] Figure 6 yes Figure 1 The specific circuit diagram of the fan control circuit shown;

[0020] Figure 7 yes Figure 1 The specific circuit diagram of the key circuit shown;

[0021] Figure 8 yes Figure 1 The specific circuit diagram of the temperature protection circuit shown;

[0022] Fig. 9 It is a specific structural schematic diagram of an electric nail gun of the utility model;

[0023] Fig.10 yes Fig. 9 The utility model is a schematic diagram of the explosion structure of an electric nail gun.

[0024] Markings in the figure: 10, circuit board assembly; 11, MCU circuit; 12, buck circuit; 121, 12V buck circuit; 122, 5V buck circuit; 13, coil control circuit; 14, fan control circuit; 15, button circuit; 16, temperature protection circuit; 20, battery pack; 30, shell assembly; 40, coil assembly; 50, push nail assembly; 60, fan; 70, button; 80, nail gate assembly. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-Figure 10 As shown, the utility model is a control drive circuit mainly used in electric nail guns, which includes an MCU circuit 11, a step-down circuit 12, a coil control circuit 13, a fan control circuit 14, a key circuit 15 and a temperature protection circuit 16; the MCU circuit 11 is electrically connected to the step-down circuit 12, the coil control circuit 13, the fan control circuit 14, the key circuit 15, and the temperature protection circuit 16 respectively; the step-down circuit 12 is electrically connected to the battery pack 20, and the output voltage of the battery pack 20 is reduced to a stable 12V and 5V respectively; the coil control circuit 13 is electrically connected to the coil assembly 40, and stably controls the input current of the coil assembly 40, so that the coil assembly 40 will not overheat; the fan control circuit 14 is electrically connected to the fan 60, and drives the fan 60 to rotate; the button circuit 15 is electrically connected to the button 70, and the operation of the coil assembly 40 is controlled by the button 70; the temperature protection circuit 60 monitors the temperature of the MCU circuit 11 in real time, and when it is detected that its temperature exceeds a preset value, the corresponding operation is performed, thereby effectively preventing the temperature of the MCU circuit 11 from being too high.

[0028] See also Figure 1 , Figure 3 and Figure 4As shown, in this embodiment, the step-down circuit 12 includes a 12V step-down circuit 121 and a 5V step-down circuit 122; the 12V step-down circuit 121 is electrically connected to the battery pack 20, the coil control circuit 13, and the fan control circuit 14, respectively, and stabilizes the output voltage of the battery pack 20 to 12V, and supplies power to the coil control circuit 13 and the fan control circuit 14 respectively; the 5V step-down circuit 122 is electrically connected to the MCU circuit 11, the 12V step-down circuit 121, and the temperature protection circuit 16, respectively, and stabilizes the output voltage of the 12V step-down circuit 121 to 5V, and supplies power to the MCU circuit 11 and the temperature protection circuit 16 respectively.

[0029] See also Figure 1 and Figure 2 As shown, in this embodiment, the MCU circuit 11 adopts a single-chip microcomputer, which includes 8 pins, pin 1 is electrically connected to the 5V step-down circuit 122; pin 2 is unconnected; pin 3 is electrically connected to the key circuit 15; pin 4 is electrically connected to the fan control circuit 14; pins 5 and 7 are electrically connected to the coil control circuit 13 respectively; pin 6 is electrically connected to the temperature protection circuit 16; and pin 8 is grounded.

[0030] See also Fig. 9 and Fig.10 As shown, the utility model is an electric nail gun comprising a circuit board assembly 10, a shell assembly 30, a coil assembly 40, a nail pushing assembly 50, a fan 60, a button 70 and a nail gate assembly 80; the shell assembly 30 is a hollow cavity; the circuit board assembly 10, the coil assembly 40 and the fan 60 are respectively fixedly arranged in the shell assembly 30, and the circuit board assembly 10 is provided with any of the control drive circuits described above; the nail pushing assembly 50 is movably arranged through the coil assembly 40, and moves under the action of the coil assembly 40; the fan 60 performs heat dissipation operation for the coil assembly 40; the button 70 is arranged through the shell assembly 30; the nail gate assembly 80 is detachably arranged on the side of the shell assembly 30 and on one side of the nail pushing assembly 50, and a plurality of U-shaped staples are arranged in sequence therein, and the nail pushing assembly 50 and the nail gate assembly 80 cooperate to perform nail shooting operation. Specifically, the battery pack 20, the coil assembly 40, the nail push assembly 50, the fan 60, the button 70 and the nail gate assembly 80 all adopt existing technologies, so their working processes and models adopted are not described here in detail, as long as they meet the requirements of this application.

[0031] It should be noted that the specific working process of the control drive circuit and the electric nail gun of the utility model is as follows: through the cooperation of the MCU circuit 11 and the coil control circuit 13, the input current of the coil component 40 is relatively stable, so that the coil component 40 will not overheat and will not cause the impact force of the nail gate component 80 to decrease; the coil component 40 is energized to generate an electromagnetic field, and the magnetic attraction generated by the electromagnetic field causes the nail pusher component 50 to move, thereby performing nail shooting operations on the U-shaped staples in the nail gate component 80 in turn.

[0032] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0033] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A control drive circuit, applied to an electric nail gun, characterized in that: It includes an MCU circuit; a step-down circuit, a coil control circuit, a fan control circuit, a button circuit and a temperature protection circuit which are electrically connected to the MCU circuit respectively; the step-down circuit is electrically connected to the battery pack, and performs a stable step-down operation on the output voltage of the battery pack; the coil control circuit is electrically connected to the coil assembly, and stably controls the input current of the coil assembly; the fan control circuit is electrically connected to the fan, and drives the fan to rotate; the button circuit is electrically connected to the button; and the temperature protection circuit monitors the temperature of the MCU circuit in real time.

2. A control driving circuit according to claim 1, characterized in that: The step-down circuit includes a 12V step-down circuit and a 5V step-down circuit; the 12V step-down circuit is electrically connected to the battery pack and the fan control circuit respectively; the 5V step-down circuit is electrically connected to the MCU circuit, the 12V step-down circuit, and the temperature protection circuit respectively.

3. A control driving circuit according to claim 2, characterized in that: The MCU circuit adopts a single chip microcomputer.

4. A control driving circuit according to claim 3, characterized in that: The MCU circuit includes 8 pins, pin 1 is electrically connected to the 5V step-down circuit; pin 2 is unconnected; pin 3 is electrically connected to the key circuit; pin 4 is electrically connected to the fan control circuit; pins 5 and 7 are electrically connected to the coil control circuit respectively; pin 6 is electrically connected to the temperature protection circuit; and pin 8 is grounded.

5. An electric nail gun, characterized in that: It includes a shell assembly, which is a hollow cavity; a circuit board assembly, a coil assembly and a fan respectively fixedly arranged in the shell assembly, and the circuit board assembly is provided with a control drive circuit as described in any one of claims 1 to 4; a push pin assembly movably penetrating the coil assembly; a nail gate assembly arranged on the side of the shell assembly and on one side of the push pin assembly, and a plurality of U-shaped nails are arranged in sequence inside.

6. The electric nail gun according to claim 5, characterized in that: The nail gate assembly is detachably connected to the side of the shell assembly.

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